Correcting and balancing shoes having springs

ABSTRACT

Disclosed in a spring shoe for a balance correction which comprises a shoe rear side bottom plate which is made from a rigid synthetic resin material and is engaged to a rear side of a lower surface of a shoe outer leather and has an engaging groove which is downwardly open at a rear, lower surface; a shoe front side bottom plate which is engaged to a front side of a lower surface of the shoe outer leather in a shape that the rear side covers the front side of the shoe rear side bottom plate; and a coil spring which is formed with its width being gradually reduced from a lower side to an upper side.

TECHNICAL FIELD

The present invention relates to a shoe with a spring beneath a rear end of a shoe, and in particular to a spring shoe for a balance correction which facilitates the sole of a user to have a uniform elastic load while ensuring that noises do not occur when the spring is compressed in such a way that the upper side and the lower side of the spring are maintained horizontal eve when a vertical load is applied.

BACKGROUND ART

A spring shoe is generally installed beneath a shoe and is configured to absorb the impacts from the ground when a user walks.

When a user uses a show with a spring, the user can have a powerful jumping force with the aid of an elastic force from the spring when the user walks. A lot of children use it for the purpose of entertainment; therefore when the same motions are repeatedly performed for a long time, the user can obtain quite exercise effects as compared to when the user uses an ordinary shoe, so the shoe with a sprig is widely used by an adult who lacks exercise time or by a person who does regularly exercise or is on diet.

In addition, the recent spring shoe is changing to different spring shoes with the aid of various ideas; however most of the newly developed spring shoes is configured in such a way that a spring is positioned between a sole of the shoe and a bottom plate of the shoe coming into direct contact with the ground, and it is fixed to beneath the sole of the sole or the bottom plate of the shoe by way of an engaging element such as a bolt, etc at the center of the spring. In this case, the spring shoe can be manufactured, but it is hard to repair the shoe when the spring is defective or it is needed to exchange the spring.

In other words, the fixing plate is detachably engaged using a screw to beneath the rear end or the bottom plate of the shoe so as to support the upper and lower end portions of the spring, and the end of the spring is inserted into the fixing plate by way of a snug fit method.

The spring shoe has a problem that the end of the spring might escape when the sole of the shoe and the bottom plate of the shoe are over distorted, so the spring shoe has a problem in safety. Since the upper and lower ends of the spring are fixedly engaged to the sole and the bottom plate, exchanging the spring and adjusting the spring balance to match with the physical status of the user are impossible.

In addition, since the spring disposed between the sole of the shoe and the bottom plate is always exposed to the outside, so impurities might be caught in the spring exposed when a compression force and a recovery force occur in the spring, so there might occur a dangerous situation due to the decreased compression force.

In addition, since the bottom plate supporting the spring is separate from the sole of the shoe, the bottom plate used to bend or used to wear easily when in use.

In order to improve the above mentioned problem, there is the Korean patent registration number 10-0947670 entitled “spring shoe” which is characterized in that the bottom plate supporting the sole of the shoe and the ground and fixing the spring can be stably engaged to the lower end of the shoe, and it is can be easily disengaged from the lower end of the shoe, so the user can easily exchange or repair. The bottom plate supporting the spring is detachably connected to the front side of the sole of the shoe, and it is rotatable from the front side of the sole of the shoe, so the spring comes to stably support the heel of the foot.

However, the above mentioned technology can obtain a good outer looking and an easier assembly and exchange work; however noises occurs from the operation portions when a user wears a spring shoe and walks.

DISCLOSURE OF INVENTION

Accordingly, the present invention is made to improve the above mentioned problems.

It is a first object of the present invention to provide a spring shoe for a balance correction which makes it possible to prevent noises from a connection portion of a spring when a user wears a spring shoe and walks.

It is a second object of the present invention to provide a spring shoe for a balance correction, which can have a stable elastic support force even though a repeated vertical load is generated, so that the upper side and the lower side of the spring have stable horizontality.

It is a third object of the present invention to provide a spring shoe for a balance correction which makes it possible to lower the unit cost with the aid of easier assembly and manufacture.

The above mentioned objects of the present invention are no limited thereto; and other objects belonging to the present invention can be obviously understood along with the descriptions below.

To achieve the above objects, there is provided a spring shoe for a balance correction, comprising a shoe rear side bottom plate which is made from a rigid synthetic resin material and is engaged to a rear side of a lower surface of a shoe outer leather and has an engaging groove which is downwardly open at a rear, lower surface; a shoe front side bottom plate which is engaged to a front side of a lower surface of the shoe outer leather in a shape that the rear side covers the front side of the shoe rear side bottom plate; a coil spring which is formed with its width being gradually reduced from a lower side to an upper side; an upper side holder plate which is integrally formed at an upper side of the coil spring and is inserted into the engaging groove in a state that it does not rotate; a spring holder which has an integrally formed lower side holder plate in order for the lower side of the coil spring to be horizontal; an engaging part which sequentially passes through the shoe outer leather and the engaging groove and is inserted into the screw groove formed at the center of the upper side holder plate with its head being caught on the shoe outer leather; and a bottom plate which is made from a soft synthetic resin material and is detachably engaged to the shoe rear side bottom plate as a bent end is formed at one side, and the other side being integrally engaged to the lower surface of the lower side holder plate.

Here a cross groove is formed on the surface of the engaging groove, and a cross protrusion is formed on an upper surface of the holder plate of the upper side, so the rotations can be prevented when engaging them.

In addition, a protrusion-shaped intermediate key is protruded from a lower surface of a front side of the shoe rear side bottom plate, and a screw groove is formed at both sides about the intermediate key; and a key groove is formed at the bent end of the bottom plate, with the intermediate key being inserted into the key groove, and a bolt hole is formed at both sides for a bolt screw-engaged in the screw groove to pass.

ADVANTAGEOUS EFFECTS

The present invention is directed to provide a uniform elastic force when a vertical load occurs in such a way to integrally engage upper and lower holder plates to the upper and lower sides of a coil spring while adjusting the thicknesses of the upper and lower holder plates.

In addition, as the spring holder is provided, the assembly is easy, and the unit cost can be greatly reduced.

Noises do not occur in the middle of the compression of the spring thanks to the upper and lower holder plates engaged to the upper and lower sides of the spring.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view illustrating a spring shoe for a balance correction according to the present invention.

FIG. 2 is a side view of FIG. 1.

FIG. 3 is a separated perspective view of FIG. 1 or FIG. 2.

FIG. 4 is a perspective view of a bottom surface of FIG. 3.

FIG. 5 is a bottom view of a bottom plate of a rear side of a shoe of FIG. 4.

FIG. 6 is a plane view illustrating an engaged state of a spring holder and a bottom plate of FIG. 3 or FIG. 4.

BEST MODES FOR CARRYING OUT THE INVENTION

The preferred embodiments of the present invention will be described with reference to the accompanying drawings. The matters deemed to make unclear the subject matters of the present invention will be omitted from the descriptions of the invention.

The detailed matters of the embodiments of the present invention are also illustrated in the descriptions and drawings, and it is obvious that the features of the present invention might be well understood along the embodiments to be described below.

As shown in FIGS. 1 to 6, the spring shoe of the present invention comprises a shoe upper leather 100, a shoe rear side bottom plate 200 engage to the bottom of a rear side of the shoe outer leather 100, a shoe front side bottom plate 300 engaged to the bottom of a front side of the shoe outer leather 100, a spring holder 400 engaged to the bottom of the shoe rear side bottom plate 200, an engaging part 500 engaging the spring holder 400 to the shoe rear side bottom plate 200, and a bottom plate 600 one end of which is engaged to one side of the shoe rear side bottom plate 200, and the other end of which is engaged to the bottom of the spring holder 400.

The shoe outer leather 100 represents a typical shoe accommodating a use's foot and protecting it and can be separated into a front side and a rear side about the center of the sole of the user.

The shoe rear side bottom plate 200 is made from a rigid synthetic resin material and is integrally engaged to the rear side of the bottom of the shoe outer leather 100 by a typical bonding method. In addition, an engaging grove 220 with a cross groove 222 is downwardly open on the bottom of the rear side of the shoe rear side bottom plate 200, and at its front side are formed an intermediate key 242 and a screw groove 252 at both sides about the intermediate key 252.

A bolt hole 260 through which the engaging part 500 passes is formed at the center of the engaging groove 220 defining the shoe rear side bottom plate 200.

The shoe front side bottom plate 300 is made from a synthetic resin material and is integrally engaged to the front side of the bottom of the shoe outer leather 100 in a typical bonding method with its rear side covering the front side of the shoe rear side bottom plate 200.

The spring holder 400 is configured to provide an elastic force to a wearer and comprises a coil spring 420 the width of which is gradually reduced from its lower side to an upper side, an upper side holder plate 440 which is integrally formed at the top of the coil spring 420 and has on its upper surface a cross protrusion 442 inserted into the engaging groove 220 and inserted into the cross groove 222, and a lower side holder plate 460 which is integrally formed for the lower side of the coil spring 420 to be horizontal.

The lower side holder plate 460 and the upper side holder plate 440 are placed in parallel upward and downward and are integrally engaged to the upper and lower sides of the coil spring 420.

The upper and lower side holder plates 440 and 460 are preferably formed along with the coil spring 420 during the formation process.

The cross groove 222 means a quadrangle groove 222 a or four long grooves 22 b outwardly prolonged from the corners or sides of the quadrangle groove 222 a, and the cross protrusion 442 means a quadrangle groove 442 a or four protrusions 442 b prolonged from the corners or sides of the quadrangle groove 442 a.

As the quadrangle protrusion 442 a of the cross protrusion 442 fits the quadrangle groove 222 a of the cross groove 222, the four protrusions 442 b are inserted into the four long grooves 222 b, thus preventing the rotations.

The above described construction is provided for obtaining a stable fixing force and a fixing force in an easier way.

The engaging part 500 sequentially passes through the shoe outer leather 100 and the cross groove 222 and is inserted into the screw groove 444 formed at the center of the cross protrusion 442 with the head part of it being caught on the bottom surface of the shoe outer leather 100.

The bottom plate 600 is made of a rigid or soft synthetic resin material and features in that one side is bent for thereby forming a bent end 620, and a key groove 662 is protruded from the bent end 620 for an insertion into the intermediate key 242, and a bolt hole 624 is formed at both side in order for the bolt 660 inserted into the screw groove 252 to pass, and the other side is integrally engaged to the lower surface of the lower side holder plate 460. Here, the bent end 620 is preferably made from a smooth material.

The assembling procedure of the spring shoe for a balance correction according to the present invention will be described with reference to the accompanying drawings.

When assembling, as shown in FIG. 2 or 3, the upper side holder plate 440 is engaged at the upper side of the coil spring 420, and the lower side holder plate 460 is engaged to the lower side, so they are integrally engaged.

At this time, the thicknesses of the upper and lower side holder plates 440 and 460 are adjusted and formed so that the load can be uniformly applied to the coil spring 420 when a vertical load is applied to the upper side holder plate 40.

In other words, the portion where greater load is applied is made to get gradually thicker, and the portion where smaller load is applied is made to get gradually thinner, so when the load generates at the upper and lower side surfaces, the coil spring 420 can be always uniformly compressed and recovered.

The bottom plate 600 is integrally bonded to the lower surface of the lower side holder plate 460 forming the spring holder 400.

Afterward, the shoe rear side bottom plate 200 is engaged to the lower surface of the shoe outer leather 100, and the shoe front side bottom plate 300 is engaged to the lower surface of the shoe outer leather 100, so the rear end of the shoe front side bottom palate 300 is engaged as if it covers the front end of the shoe rear side bottom plate 200.

Continuously, the upper side holder plate 440 disposed at the upper side of the spring holder 400 is positioned at the engaging groove 220 of the shoe rear side bottom plate 200 and is pushed while matching the cross protrusion 422 with the cross groove 222.

The spring holder 400 is tightened and engaged to the shoe rear side bottom plate 200 by way of the engaging part 500.

Continuously, the key groove 622 formed at the bent end 620 of the bottom plate 600 is fixedly engaged with the intermediate key 242 positioned at the bottom of the front side of the shoe rear side bottom plate 200, and the bolt 660 is tightened at both sides, so the bottom plate 600 is engaged to the shoe rear side bottom plate 200, thus completing the assembly as shown in FIG. 1 or 2.

As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described examples are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims. 

1. A spring shoe for a balance correction, comprising: a shoe rear side bottom plate 200 which is made from a rigid synthetic resin material and is engaged to a rear side of a lower surface of a shoe outer leather 100 and has an engaging groove 220 which is downwardly open at a rear, lower surface; a shoe front side bottom plate 300 which is engaged to a front side of a lower surface of the shoe outer leather 100 in a shape that the rear side covers the front side of the shoe rear side bottom plate 200; a coil spring 420 which is formed with its width being gradually reduced from a lower side to an upper side; an upper side holder plate 440 which is integrally formed at an upper side of the coil spring 420 and is inserted into the engaging groove 220 in a state that it does not rotate; a spring holder 400 which has an integrally formed lower side holder plate 460 in order for the lower side of the coil spring 420 to be horizontal; an engaging part 500 which sequentially passes through the shoe outer leather 100 and the engaging groove 220 and is inserted into the screw groove 444 formed at the center of the upper side holder plate 440 with its head being caught on the shoe outer leather 100; and a bottom plate 600 which is made from a soft synthetic resin material and is detachably engaged to the shoe rear side bottom plate 200 as a bent end 620 is formed at one side, and the other side being integrally engaged to the lower surface of the lower side holder plate 460, wherein a protrusion-shaped intermediate key 242 is protruded from a lower surface of a front side of the shoe rear side bottom plate 200, and a screw groove 252 is formed at both sides about the intermediate key 242; and a key groove 622 is formed at the bent end 620 of the bottom plate 600, with the intermediate key 242 being inserted into the key groove 622, and a bolt hole 624 is formed at both sides for a bolt 660 screw-engaged in the screw groove 252 to pass. 